Merge pull request #3381 from suppermancool/feature-sort-registrations-diazz

fix background for header registrants  in safari

Author: codeMinter

src/shared/components/challenge-detail/Registrants/style.scss

@@ -209,6 +209,7 @@
 
 .table-header {
   cursor: pointer;
+  background: transparent;
 
   &:hover {
     color: $tc-dark-blue;